Water Scenarios Modelling for Renewable Energy Development in Southern Morocco

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Water Scenarios Modelling for Renewable Energy Development in Southern Morocco ISSN 1848-9257 Journal of Sustainable Development Journal of Sustainable Development of Energy, Water of Energy, Water and Environment Systems and Environment Systems http://www.sdewes.org/jsdewes http://www.s!ewes or"/js!ewes Year 2021, Volume 9, Issue 1, 1080335 Water Scenarios Modelling for Renewable Energy Development in Southern Morocco Sibel R. Ersoy*1, Julia Terrapon-Pfaff 2, Lars Ribbe3, Ahmed Alami Merrouni4 1Division Future Energy and Industry Systems, Wuppertal Institute for Climate, Environment and Energy, Döppersberg 19, 42103 Wuppertal, Germany e-mail: [email protected] 2Division Future Energy and Industry Systems, Wuppertal Institute for Climate, Environment and Energy, Döppersberg 19, 42103 Wuppertal, Germany e-mail: [email protected] 3Institute for Technology and Resources Management, Technical University of Cologne, Betzdorferstraße 2, 50679 Köln, Germany e-mail: [email protected] 4Materials Science, New Energies & Applications Research Group, Department of Physics, University Mohammed First, Mohammed V Avenue, P.O. Box 524, 6000 Oujda, Morocco Institut de Recherche en Energie Solaire et Energies Nouvelles – IRESEN, Green Energy Park, Km 2 Route Régionale R206, Benguerir, Morocco e-mail: [email protected] Cite as: Ersoy, S. R., Terrapon-Pfaff, J., Ribbe, L., Alami Merrouni, A., Water Scenarios Modelling for Renewable Energy Development in Southern Morocco, J. sustain. dev. energy water environ. syst., 9(1), 1080335, 2021, DOI: https://doi.org/10.13044/j.sdewes.d8.0335 ABSTRACT Water and energy are two pivotal areas for future sustainable development, with complex linkages existing between the two sectors. These linkages require special attention in the context of the energy transition. Against this background, this paper analyses the role of water availability in the development of solar thermal and photovoltaic power plants for the case of the Drâa Valley in southern Morocco. Located in a semi-arid to arid mountainous area, the Drâa Valley faces high water stress – a situation expected to worsen due to climate change. At the same time, the region has one of the greatest potentials for solar energy in the world. To examine whether limited water availability could accelerate or delay the implementation of solar thermal and photovoltaic power plants, this paper compares regional water availability and demand in the Drâa Valley for different scenarios, paying particular attention to potential socio-economic development pathways. The Water Evaluation and Planning System software is applied to allocate the water resources in the study region. The water supply is modelled under the Representative Concentration Pathway 8.5 climate scenario, while the water demand for the Drâa Valley is modelled for a combination of three socio-economic and two energy scenarios. The climate scenario describes a significant decrease in water availability by 2050, while the socio-economic and energy scenarios show an increase in water demand. The results demonstrate that during a sequence of dry years the reservoirs water availability is reduced and shortages in water supply can result in high levels of unmet demand. If this situation occurs, oasis farming, water for drinking and energy production could compete directly with each other for water resources. The energy scenarios indicate that the use of dry cooling technologies in concentrated solar power and photovoltaic hybrid systems could be one option for reducing competition for the scarce water * Corresponding author 1 $rso%, S & , et al. Year 2021 'ater S(e)ar*os +o!ell*)" ,or &e)ewa-le $)er"% Volume 9, Issue 1, 1080335 resources in the region. However, given that energy generation accounts for only a small share of the regional water demand, the results also suggest that socio-economic demand reduction, especially in the agricultural sector, for example by reducing the cultivated area, will most likely become necessary. KEYWORDS Water evaluation and planning, Water demand modelling, Hybrid concentrated solar power-photovoltaic systems, Scenario, Socio-economic development, Morocco. INTRODUCTION Concentrated Solar Power (CSP) is a promising renewable energy technology with the potential to become mainstream, like wind, hydro and Photovoltaic (PV) technologies [1]. Although, compared to an installed solar PV capacity of 300 GW the installed capacity of CSP worldwide is still low with 4.8 GW in 2016, but the International Energy Agency (IEA) expects that the capacities will be doubled by 2022 [2]. As consulted by Gauché et al. [3] or Brand et al. [4], CSP technology combined with thermal storage has the ability to become dispatchable, enabling to store solar energy during the day and to deliver electricity during the night compared to other technologies. Furthermore, thermal energy storage systems permit a flexible operation at high efficiencies and capacity factors while having the lowest storage costs as shown by Trieb et al. [5] who analysed the efficiencies and capacity factors of the CSP technology, by DLR [6] which likewise focused on innovative techniques for power generation and by experts for solar thermal electricity [7]. However, a key challenge for the development of CSP technology is its high level of water consumption compared to other renewable energy technologies [8]. Water consumption is particularly relevant in arid to semi-arid regions like Souss-Massa-Drâa and Tata in southern Morocco. On the plus side, however, these areas are characterised by high Direct Normal Irradiation (DNI) conditions that exceed 2,400 kWh/m2 annually making them highly suitable for the implementation of CSP plants [9]. Morocco’s CSP potential is estimated to amount to 20,000 TWh/y [10]. According to the Moroccan Ministry of Energy, Mines, Water and Environment [11] and official policy papers [12], CSP has been identified as a promising element in Morocco’s ambitious strategy to increase its renewable share in the electricity mix from 8.7% in 2012 to 42% by 2020 and 52% by 2030, to achieve a ‘low-carbon and climate change resilient development’ [13]. Renewable energy technologies will also help to meet the country’s increasing electricity demand (16 TWh in 2002 and 31 TWh in 2012 [13]), caused by a growing population and continued industrial development. Being an intermittent technology, solar energy technology only produces electricity during sunshine hours. To cover the country’s peak demand hours, large storage systems such as molten salt can ensure the electricity supply. CSP with thermal storage is especially suitable to provide energy during the country’s peak demand in the evenings and the annual peak, which has changed from winter peak to a summer peak due to air cooling demands according to the energy policy analysis conducted by IEA [13], the background paper of Morocco elaborated by Schinke et al. [12] and by the Moroccan Agency for Solar Energy (MASEN) [14]. Yet, despite these advantages the high water demand and the higher costs compared to PV lead to the question, if, to what extent and in which combination CSP can be implemented at specific sites in Morocco. According to some experts, the combination of PV and Solar Thermal Energy (STE) is the clear solution to provide base load in most days of the year [7]. According to the Moroccan Solar Plan (MSP), launched in 2009, MASEN plans to implement a sufficient number of large-scale utility solar complexes to produce 2,000 MW solar energy by 2020 [15]. One of the project sites is Akka Ighane, located in the region of Tata, where a 600 MW solar facility (NOOR Tata) is planned as stated by Journal of Sustainable Development of Energy, Water and Environment Systems 2 $rso%, S & , et al. Year 2021 'ater S(e)ar*os +o!ell*)" ,or &e)ewa-le $)er"% Volume 9, Issue 1, 1080335 MASEN [14], the German Chamber of Industry and Commerce Abroad (AHK) [16] and the Moroccan-German Energy Partnership (PAREMA) [17]. As it is sited in one of the regions of greatest water scarcity in Morocco, the linkages between energy generation and water resources need to be carefully considered in the development of the NOOR Tata project. This paper therefore addresses the question how different solar technology development pathways can influence the sustainability in regards to water resources in the region. To date, a number of studies have addressed water consumption in the energy sector using an integrated approach in an attempt to find potential solutions by coupling the power and water generation sectors. Agrawal et al. [18], for example, analysed Long-range Energy Alternatives Planning System and Water Evaluation and Planning System (LEAP-WEAP) software climate change scenarios by forecasting water consumption and Greenhouse Gas (GHG) emissions from the power sector in Canada, while Valenzuela et al. [19] studied the integration of CSP and PV hybrid solar systems and seawater desalination in Chile and Bazilian et al. [20] presented a modelling framework that addresses the nexus with a focus on developing countries. Likewise, the literature has analysed water systems in arid to semi-arid mountainous regions in the Middle East and North Africa. Johannsen et al. [21] analysed the future of water supply and demand in the Middle Drâa Valley under the conditions of climate change and land use change, while Karmaoui et al. [22] applied a multidisciplinary approach to assess environmental vulnerability in the Upper Drâa Valley and Ben Salem et al. [23] modelled the Ziz basin in south-eastern Morocco under various water allocation scenarios. Droogers et al. [24] demonstrated that water shortages are mainly attributed to socio-economic factors, while López-Gunn et al. [25] found that water-saving measures can lead to rebound effects and increase the overall local water consumption. Yet, what is, however, still missing are integrated assessments that address the question of renewable energy development options and water resources in arid regions, which also take into account the potential socio-economic development pathways. This is especially critical as more and more renewable energy projects are deployed in water-scarce regions.
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